[llvm] [InstCombine] Improve `(icmp pred (and X, Y), ...)` fold. (PR #66787)

[via llvm-commits]

goldsteinn wrote:

> > I'm still trying to work out how best to create stacked PRs (especially when adding extra tests and want to show the diff) - everyone seems to have their own opinion on them right now :)
> 
> I don't really know either. If you know a better way than this I'm all ears.

What might improve the situation is if we could create branch on the llvm-project repo. I.e `users/<gh-username>/<branch-name>`. Then we could create series of PRs i.e
`main` <- `users/<user>/feature-patch-0` <- `users/<user>/feature-patch-1` <-... `users/<user>/feature-patch-N`


https://github.com/llvm/llvm-project/pull/66787